If you have a new Blogger template, but wanted to change back to Minima, luckily that's easy. You just had to go to your blog "Design" > "edit HTML" > scroll down and choose "Select Layout Template" > choose "Minima" (first tempalate) > save.
But, if anyone can advice me with new templates, I'd love to learn what to do. Then I could promise new backgrounds for new templates too.
And I must apologize, that I haven't had time to response to any comments or emails. And I'm afraid that until Christmas I'll be to busy to do that. Get back after Christmas, if you still need help or advice. I'm going to delete my email. And I start replying on your requests after Christmas. I know, I'm awful, I hope you understand. ;)